Method of producing a material composite with explosion-welded intermediate piece

Abstract

A material composite has a part made from steel or a titanium-based material and a part made from a copper-based or aluminum-based material. The parts of the material composite are joined by way of an intermediate piece. The intermediate piece likewise comprises a region made from steel or a titanium-based material and a region made from a copper-based or aluminum-based material, which are connected by explosion welding. The parts of the material composite are connected to the regions of the intermediate piece which are in each case of the same type by means of a fusion or diffusion welding process.

1. A method of producing a material composite having a first tube made from steel and a second tube made from a copper-based material, the method which comprises:
 producing a tube section consisting of a first region made from steel and a second region made from a copper-based material, the first and second regions being connected by explosion welding forming a joining zone; 
 connecting the first tube made from steel to the first region made from steel by way of a fusion or diffusion welding process so as to form a joining zone; and 
 connecting the second tube made from a copper-based material to the second region made from the copper-based material, by way of a fusion or diffusion welding process so as to form a joining zone. 
 
     
     
       2. The method according to  claim 1 , which comprises connecting a metal sheet made from a copper-based material to a metal sheet made from steel by explosion welding to form a composite, and machining the-tube section out of the composite. 
     
     
       3. The method according to  claim 1 , which comprises connecting the first tube to the first region and connecting the second tube to the second region by TIG, laser or electron beam welding. 
     
     
       4. The method according to  claim 1 , wherein the steel of the first region, at least in regions thereof, has an austenitic microstructure. 
     
     
       5. The method according to  claim 1 , wherein the copper-based material is a particle-hardened material. 
     
     
       6. The method according to  claim 5 , wherein the copper-based material is Cu—Cr—Zr. 
     
     
       7. The method according to  claim 1 , which comprises forming the material composite as a first wall component or as a part of a first wall component of a fusion reactor. 
     
     
       8. The method according to  claim 1 , which comprises forming the first tube, the second tube, and the tube section with a substantially common diameter and connecting the first tube, the tube section, and the second tube to one another to form a substantially continuous tube with the common diameter.